This sensor is based on a unique capacitive cell, this affordable sensor is used in applications such as office automation, HVAC and home appliances and process control too.
HS1101LF Humidity Sensor – Measurement Specialties
This sensor sports a fast response time and very low temperature coefficient. It also has High reliability and long term stability of Parameters.
Humidity Measuring Range 1% – 99% RH. Nominal capacitance at 55% RH is 180 pF.
A Humidity to Frequency Convertor to make a Easy Digital Counter or Embedded Interface using the venerable 555 is shown below.
Correction – R4=49.9kΩ / RV1=50 kΩ potentiometer.
“Measurement Specialties is a global designer and manufacturer of sensors and sensor-based systems which measure pressure/force, position, vibration, temperature, humidity, and fluid properties.”
1000, Lucas Way Hampton, VA 23666 United States.
This water proof, chemical resistant, low drift Humidity and Temperature module from IST :provides a fully calibrated and compensated humidity and temperature digital signal output.
HYT 271 Humidity Temperature Module – IST AG
The Digital output is for a I2C interface in a 14 bit resolution. Accuracy at 23 °C is +/- 1.8 % RH in the span of 0 % RH to 80 % RH. This reading comes with a Response time of less than 4 seconds.
They also have a LabKit with USB Interface to evaluate and implement in your system.
“The Labkit was developed as a Plug&Play tool for a fast evaluation of the HYGROCHIP digital humidity sensors. The ready-to-use system consists of a PC-adapter with an USB connecting wire, a connection adapter with plugs for all product variants.”
Component level. manufacturer of thin-film RTD temperature sensors, capacitive humidity sensors, mass flow sensors and conductivity sensors.
Innovative Sensor Technology IST AG
Stegrütistrasse 14 9642 Ebnat-Kappel Switzerland